Waterborne coating compositions that include 2,2,4-trimethyl-3-oxopentanoate esters as reactive coalescents

摘要

Waterborne coating compositions are disclosed that include a latex emulsion polymer, and, as a reactive coalescent, a 2,2,4-trimethyl-3-oxopentanoate ester. The coating compositions of the invention have a reduced VOC content, and provide improved coalescing activity.

主权项

1. A waterborne coating composition comprising:
(a) a latex emulsion polymer prepared by an emulsion free-radical polymerization of ethylenically unsaturated monomers; and (b) a 2,2,4-trimethyl-3-oxopentanoate ester corresponding to the following formula 1:wherein R comprises a residue from any of the following hydroxyl-functional compounds:
i) a straight or branched chain monohydroxyl compound having from 1-20 carbon atoms; ii) a straight or branched chain alkyl glycol having from 2 to 20 carbon atoms; iii) a straight or branched chain ether alcohol having from 3 to 20 carbon atoms; iv) a straight or branched chain ether glycol having from 3 to 18 carbon atoms; v) a cyclic alkyl alcohol or glycol having from 5 to 18 carbon atoms; or vi) a cyclic ether alcohol or glycol having from 5 to 18 carbon atoms; wherein the alcohol has one hydroxyl group, and the glycol has two hydroxyl groups.